User's Manual

17 KPI Glossary 40
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Loupe User Guide Release 3.1
QUIP006
WLAN radio frame size, FTP
uplink
RF frame size distribution in FTP uplink
transfer test. If possible, WLAN devices try
to use the maximum transmission unit. Due
to radio interference, WLAN devices might
reduce the frame size, which leads to
relatively larger frame overhead, and
eventually to lower data throughput. Note
that this value is the size of the data link
layer frame, which is defined by IEEE
802.11, thus, this indicator doesn't indicate
the size of TCP/IP packets.
byte(s)
QUIP013
WLAN radio frame size, HTTP
downlink
RF frame size distribution in HTTP downlink
transfer test. If possible, WLAN devices try
to use the maximum transmission unit. Due
to radio interference, WLAN devices might
reduce the frame size, which leads to
relatively larger frame overhead, and
eventually to lower data throughput. Note
that this value is the size of the data link
layer frame, which is defined by IEEE
802.11, thus, this indicator doesn't indicate
the size of TCP/IP packets.
byte(s)
QURS001
Channel noise level at Eye
RF noise level in dBm, measured by Eye.
dBm
QURS002
Managed AP signal level at Eye
Measures the AP transmitted power level
of radio signal from the Eye point of view.
dBm
QURS003
AP signal to noise ratio (SNR) at
Eye
Measures the AP transmitted power level
of radio signal relative to the power level of
noise received by an Eye. Measures the AP
transmitted power level of radio signal
relative to the power level of noise
received by an Eye.
dB
QURS004
AP radio retransmission rate
Number of retransmitted frames divided by
the number of all the frames sent to
downlink by an AP.
QURS009
Global AP signal level at Eye
Measures the AP transmitted power level
of radio signal from the Eye point of view.
dBm
QURS026
Eye-AP signal level in FTP DL
Signal power level between AP and Eye,
during an FTP download test. Signal power
level between AP and Eye, during an FTP
download test.
dBm